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Diffstat (limited to 'src/seltrans.cpp')
| -rw-r--r-- | src/seltrans.cpp | 1712 |
1 files changed, 1712 insertions, 0 deletions
diff --git a/src/seltrans.cpp b/src/seltrans.cpp new file mode 100644 index 0000000..96e6b2c --- /dev/null +++ b/src/seltrans.cpp @@ -0,0 +1,1712 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Helper object for transforming selected items. + */ +/* Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * bulia byak <buliabyak@users.sf.net> + * Carl Hetherington <inkscape@carlh.net> + * Diederik van Lierop <mail@diedenrezi.nl> + * Abhishek Sharma + * + * Copyright (C) 1999-2002 Lauris Kaplinski + * Copyright (C) 1999-2014 Authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <cstring> +#include <string> + +#include <gdk/gdkkeysyms.h> +#include <glibmm/i18n.h> + +#include <2geom/transforms.h> + +#include "seltrans.h" + +#include "desktop-style.h" +#include "desktop.h" +#include "document-undo.h" +#include "document.h" +#include "knot.h" +#include "message-stack.h" +#include "mod360.h" +#include "pure-transform.h" +#include "selection-chemistry.h" +#include "selection.h" +#include "seltrans-handles.h" +#include "verbs.h" + +#include "display/snap-indicator.h" +#include "display/sodipodi-ctrl.h" +#include "display/sp-ctrlline.h" +#include "display/guideline.h" + +#include "helper/action.h" + +#include "object/sp-item-transform.h" +#include "object/sp-namedview.h" +#include "object/sp-root.h" + +#include "ui/control-manager.h" +#include "ui/tools/select-tool.h" + +using Inkscape::ControlManager; +using Inkscape::DocumentUndo; + +static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data); +static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint state, SPSelTransHandle const* data); +static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data); +static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const &position, guint32 state, SPSelTransHandle const* data); +static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *p, guint state, SPSelTransHandle const *data); + +extern GdkPixbuf *handles[]; + +static gboolean sp_sel_trans_handle_event(SPKnot *knot, GdkEvent *event, SPSelTransHandle const*) +{ + switch (event->type) { + case GDK_MOTION_NOTIFY: + break; + case GDK_KEY_PRESS: + if (Inkscape::UI::Tools::get_latin_keyval (&event->key) == GDK_KEY_space) { + /* stamping mode: both mode(show content and outline) operation with knot */ + if (!SP_KNOT_IS_GRABBED(knot)) { + return FALSE; + } + SPDesktop *desktop = knot->desktop; + Inkscape::SelTrans *seltrans = SP_SELECT_CONTEXT(desktop->event_context)->_seltrans; + seltrans->stamp(); + return TRUE; + } + break; + default: + break; + } + + return FALSE; +} + +Inkscape::SelTrans::BoundingBoxPrefsObserver::BoundingBoxPrefsObserver(SelTrans &sel_trans) : + Observer("/tools/bounding_box"), + _sel_trans(sel_trans) +{ +} + +void Inkscape::SelTrans::BoundingBoxPrefsObserver::notify(Preferences::Entry const &val) +{ + _sel_trans._boundingBoxPrefsChanged(static_cast<int>(val.getBool())); +} + +Inkscape::SelTrans::SelTrans(SPDesktop *desktop) : + _desktop(desktop), + _selcue(desktop), + _state(STATE_SCALE), + _show(SHOW_CONTENT), + _grabbed(false), + _show_handles(true), + _bbox(), + _visual_bbox(), + _absolute_affine(Geom::Scale(1,1)), + _opposite(Geom::Point(0,0)), + _opposite_for_specpoints(Geom::Point(0,0)), + _opposite_for_bboxpoints(Geom::Point(0,0)), + _origin_for_specpoints(Geom::Point(0,0)), + _origin_for_bboxpoints(Geom::Point(0,0)), + _stamp_cache(std::vector<SPItem*>()), + _message_context(desktop->messageStack()), + _bounding_box_prefs_observer(*this) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + int prefs_bbox = prefs->getBool("/tools/bounding_box"); + _snap_bbox_type = !prefs_bbox ? + SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; + + g_return_if_fail(desktop != nullptr); + + _updateVolatileState(); + _current_relative_affine.setIdentity(); + + _center_is_set = false; // reread _center from items, or set to bbox midpoint + + _makeHandles(); + _updateHandles(); + + _selection = desktop->getSelection(); + + _norm = sp_canvas_item_new(desktop->getControls(), + SP_TYPE_CTRL, + "anchor", SP_ANCHOR_CENTER, + "mode", SP_CTRL_MODE_XOR, + "shape", SP_CTRL_SHAPE_BITMAP, + "size", 13, + "filled", TRUE, + "fill_color", 0x00000000, + "stroked", TRUE, + "stroke_color", 0xff0000b0, + "pixbuf", handles[12], + NULL); + + _grip = sp_canvas_item_new(desktop->getControls(), + SP_TYPE_CTRL, + "anchor", SP_ANCHOR_CENTER, + "mode", SP_CTRL_MODE_XOR, + "shape", SP_CTRL_SHAPE_CROSS, + "size", 7, + "filled", TRUE, + "fill_color", 0xffffff7f, + "stroked", TRUE, + "stroke_color", 0xff0000b0, + "pixbuf", handles[12], + NULL); + + sp_canvas_item_hide(_grip); + sp_canvas_item_hide(_norm); + + for (auto & i : _l) { + i = ControlManager::getManager().createControlLine(desktop->getControls()); + sp_canvas_item_hide(i); + } + + _sel_changed_connection = _selection->connectChanged( + sigc::mem_fun(*this, &Inkscape::SelTrans::_selChanged) + ); + + _sel_modified_connection = _selection->connectModified( + sigc::mem_fun(*this, &Inkscape::SelTrans::_selModified) + ); + + _all_snap_sources_iter = _all_snap_sources_sorted.end(); + + prefs->addObserver(_bounding_box_prefs_observer); +} + +Inkscape::SelTrans::~SelTrans() +{ + _sel_changed_connection.disconnect(); + _sel_modified_connection.disconnect(); + + for (auto & knot : knots) { + knot_unref(knot); + knot = nullptr; + } + + if (_norm) { + sp_canvas_item_destroy(_norm); + _norm = nullptr; + } + if (_grip) { + sp_canvas_item_destroy(_grip); + _grip = nullptr; + } + for (auto & i : _l) { + if (i) { + sp_canvas_item_destroy(i); + i = nullptr; + } + } + + for (auto & _item : _items) { + sp_object_unref(_item, nullptr); + } + + _items.clear(); + _items_const.clear(); + _items_affines.clear(); + _items_centers.clear(); +} + +void Inkscape::SelTrans::resetState() +{ + _state = STATE_SCALE; +} + +void Inkscape::SelTrans::increaseState() +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool show_align = prefs->getBool("/dialogs/align/oncanvas", false); + + if (_state == STATE_SCALE) { + _state = STATE_ROTATE; + } else if (_state == STATE_ROTATE && show_align) { + _state = STATE_ALIGN; + } else { + _state = STATE_SCALE; + } + + _center_is_set = true; // no need to reread center + + _updateHandles(); +} + +void Inkscape::SelTrans::setCenter(Geom::Point const &p) +{ + _center = p; + _center_is_set = true; + + // Write the new center position into all selected items + auto items= _desktop->selection->items(); + for (auto iter=items.begin();iter!=items.end(); ++iter) { + SPItem *it = SP_ITEM(*iter); + it->setCenter(p); + // only set the value; updating repr and document_done will be done once, on ungrab + } + + _updateHandles(); +} + +void Inkscape::SelTrans::grab(Geom::Point const &p, gdouble x, gdouble y, bool show_handles, bool translating) +{ + // While dragging a handle, we will either scale, skew, or rotate and the "translating" parameter will be false + // When dragging the selected item itself however, we will translate the selection and that parameter will be true + Inkscape::Selection *selection = _desktop->getSelection(); + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + + g_return_if_fail(!_grabbed); + + _grabbed = true; + _show_handles = show_handles; + _updateVolatileState(); + _current_relative_affine.setIdentity(); + + _changed = false; + + if (_empty) { + return; + } + + auto items= _desktop->selection->items(); + for (auto iter=items.begin();iter!=items.end(); ++iter) { + SPItem *it = static_cast<SPItem*>(sp_object_ref(*iter, nullptr)); + _items.push_back(it); + _items_const.push_back(it); + _items_affines.push_back(it->i2dt_affine()); + _items_centers.push_back(it->getCenter()); // for content-dragging, we need to remember original centers + SPLPEItem *lpeitem = dynamic_cast<SPLPEItem *>(it); + if (lpeitem && lpeitem->hasPathEffectRecursive()) { + sp_lpe_item_update_patheffect(lpeitem, false, false); + } + } + + if (y != -1 && _desktop->is_yaxisdown()) { + y = 1 - y; + } + + _handle_x = x; + _handle_y = y; + + // The selector tool should snap the bbox, special snappoints, and path nodes + // (The special points are the handles, center, rotation axis, font baseline, ends of spiral, etc.) + + // First, determine the bounding box + _bbox = selection->bounds(_snap_bbox_type); + _visual_bbox = selection->visualBounds(); // Used for correctly scaling the strokewidth + _geometric_bbox = selection->geometricBounds(); + + _point = p; + if (_geometric_bbox) { + _point_geom = _geometric_bbox->min() + _geometric_bbox->dimensions() * Geom::Scale(x, y); + } else { + _point_geom = p; + } + + // Next, get all points to consider for snapping + SnapManager const &m = _desktop->namedview->snap_manager; + _snap_points.clear(); + if (m.someSnapperMightSnap(false)) { // Only search for snap sources when really needed, to avoid unnecessary delays + _snap_points = selection->getSnapPoints(&m.snapprefs); // This might take some time! + } + if (_snap_points.size() > 200 && !(prefs->getBool("/options/snapclosestonly/value", false))) { + /* Snapping a huge number of nodes will take way too long, so limit the number of snappable nodes + A typical user would rarely ever try to snap such a large number of nodes anyway, because + (s)he would hardly be able to discern which node would be snapping */ + std::cout << "Warning: limit of 200 snap sources reached, some will be ignored" << std::endl; + _snap_points.resize(200); + // Unfortunately, by now we will have lost the font-baseline snappoints :-( + } + + // Find bbox hulling all special points, which excludes stroke width. Here we need to include the + // path nodes, for example because a rectangle which has been converted to a path doesn't have + // any other special points + Geom::OptRect snap_points_bbox = selection->bounds(SPItem::GEOMETRIC_BBOX); + + _bbox_points.clear(); + // Collect the bounding box's corners and midpoints for each selected item + if (m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY)) { + bool c = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CORNER); + bool mp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_MIDPOINT); + bool emp = m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_EDGE_MIDPOINT); + // Preferably we'd use the bbox of each selected item, but for example 50 items will produce at least 200 bbox points, + // which might make Inkscape crawl(see the comment a few lines above). In that case we will use the bbox of the selection as a whole + bool c1 = (_items.size() > 0) && (_items.size() < 50); + bool c2 = prefs->getBool("/options/snapclosestonly/value", false); + if (translating && (c1 || c2)) { + // Get the bounding box points for each item in the selection + for (auto & _item : _items) { + Geom::OptRect b = _item->desktopBounds(_snap_bbox_type); + getBBoxPoints(b, &_bbox_points, false, c, emp, mp); + } + } else { + // Only get the bounding box points of the selection as a whole + getBBoxPoints(selection->bounds(_snap_bbox_type), &_bbox_points, false, c, emp, mp); + } + } + + if (_bbox) { + // There are two separate "opposites" (i.e. opposite w.r.t. the handle being dragged): + // - one for snapping the boundingbox, which can be either visual or geometric + // - one for snapping the special points + // The "opposite" in case of a geometric boundingbox always coincides with the "opposite" for the special points + // These distinct "opposites" are needed in the snapmanager to avoid bugs such as LP167905 (in which + // a box is caught between two guides) + _opposite_for_bboxpoints = _bbox->min() + _bbox->dimensions() * Geom::Scale(1-x, 1-y); + if (snap_points_bbox) { + _opposite_for_specpoints = (*snap_points_bbox).min() + (*snap_points_bbox).dimensions() * Geom::Scale(1-x, 1-y); + } else { + _opposite_for_specpoints = _opposite_for_bboxpoints; + } + _opposite = _opposite_for_bboxpoints; + } + + // When snapping the node closest to the mouse pointer is absolutely preferred over the closest snap + // (i.e. when weight == 1), then we will not even try to snap to other points and disregard those other points + + if (prefs->getBool("/options/snapclosestonly/value", false)) { + _keepClosestPointOnly(p); + } + + if ((x != -1) && (y != -1)) { + sp_canvas_item_show(_norm); + sp_canvas_item_show(_grip); + } + + if (_show == SHOW_OUTLINE) { + for (auto & i : _l) + sp_canvas_item_show(i); + } + + _updateHandles(); + g_return_if_fail(_stamp_cache.empty()); +} + +void Inkscape::SelTrans::transform(Geom::Affine const &rel_affine, Geom::Point const &norm) +{ + g_return_if_fail(_grabbed); + g_return_if_fail(!_empty); + + Geom::Affine const affine( Geom::Translate(-norm) * rel_affine * Geom::Translate(norm) ); + + if (_show == SHOW_CONTENT) { + // update the content + for (unsigned i = 0; i < _items.size(); i++) { + SPItem &item = *_items[i]; + if( SP_IS_ROOT(&item) ) { + _desktop->messageStack()->flash(Inkscape::WARNING_MESSAGE, _("Cannot transform an embedded SVG.")); + break; + } + Geom::Affine const &prev_transform = _items_affines[i]; + item.set_i2d_affine(prev_transform * affine); + // The new affine will only have been applied if the transformation is different from the previous one, see SPItem::set_item_transform + } + } else { + if (_bbox) { + Geom::Point p[4]; + /* update the outline */ + for (unsigned i = 0 ; i < 4 ; i++) { + p[i] = _bbox->corner(i) * affine; + } + for (unsigned i = 0 ; i < 4 ; i++) { + _l[i]->setCoords(p[i], p[(i+1)%4]); + } + } + } + + _current_relative_affine = affine; + _changed = true; + _updateHandles(); +} + +void Inkscape::SelTrans::ungrab() +{ + g_return_if_fail(_grabbed); + _grabbed = false; + _show_handles = true; + + _desktop->snapindicator->remove_snapsource(); + + Inkscape::Selection *selection = _desktop->getSelection(); + _updateVolatileState(); + + for (auto & _item : _items) { + sp_object_unref(_item, nullptr); + } + + sp_canvas_item_hide(_norm); + sp_canvas_item_hide(_grip); + + if (_show == SHOW_OUTLINE) { + for (auto & i : _l) + sp_canvas_item_hide(i); + } + if(!_stamp_cache.empty()){ + _stamp_cache.clear(); + } + + _message_context.clear(); + + if (!_empty && _changed) { + if (!_current_relative_affine.isIdentity()) { // we can have a identity affine + // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed by the handles; + + selection->applyAffine(_current_relative_affine, (_show == SHOW_OUTLINE) ? true : false); + if (_center) { + *_center *= _current_relative_affine; + _center_is_set = true; + } + + // If dragging showed content live, sp_selection_apply_affine cannot change the centers + // appropriately - it does not know the original positions of the centers (all objects already have + // the new bboxes). So we need to reset the centers from our saved array. + if (_show != SHOW_OUTLINE && !_current_relative_affine.isTranslation()) { + for (unsigned i = 0; i < _items_centers.size(); i++) { + SPItem *currentItem = _items[i]; + if (currentItem->isCenterSet()) { // only if it's already set + currentItem->setCenter (_items_centers[i] * _current_relative_affine); + currentItem->updateRepr(); + } + } + } + } + + _items.clear(); + _items_const.clear(); + _items_affines.clear(); + _items_centers.clear(); + + if (!_current_relative_affine.isIdentity()) { // we can have a identity affine + // when trying to stretch a perfectly vertical line in horizontal direction, which will not be allowed + // by the handles; this would be identified as a (zero) translation by isTranslation() + if (_current_relative_affine.isTranslation()) { + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Move")); + } else if (_current_relative_affine.withoutTranslation().isScale()) { + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Scale")); + } else if (_current_relative_affine.withoutTranslation().isRotation()) { + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Rotate")); + } else { + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Skew")); + } + } else { + _updateHandles(); + } + + } else { + + if (_center_is_set) { + // we were dragging center; update reprs and commit undoable action + auto items= _desktop->selection->items(); + for (auto iter=items.begin();iter!=items.end(); ++iter) { + SPItem *it = *iter; + it->updateRepr(); + } + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Set center")); + } + + _items.clear(); + _items_const.clear(); + _items_affines.clear(); + _items_centers.clear(); + _updateHandles(); + } +} + +/* fixme: This is really bad, as we compare positions for each stamp (Lauris) */ +/* fixme: IMHO the best way to keep sort cache would be to implement timestamping at last */ + +void Inkscape::SelTrans::stamp() +{ + Inkscape::Selection *selection = _desktop->getSelection(); + + bool fixup = !_grabbed; + if ( fixup && !_stamp_cache.empty() ) { + // TODO - give a proper fix. Simple temporary work-around for the grab() issue + _stamp_cache.clear(); + } + + /* stamping mode */ + if (!_empty) { + std::vector<SPItem*> l; + if (!_stamp_cache.empty()) { + l = _stamp_cache; + } else { + /* Build cache */ + l.insert(l.end(), selection->items().begin(), selection->items().end()); + sort(l.begin(), l.end(), sp_object_compare_position_bool); + _stamp_cache = l; + } + + for(auto original_item : l) { + Inkscape::XML::Node *original_repr = original_item->getRepr(); + + // remember parent + Inkscape::XML::Node *parent = original_repr->parent(); + + Inkscape::XML::Node *copy_repr = original_repr->duplicate(parent->document()); + + // add the new repr to the parent + parent->addChild(copy_repr, original_repr->prev()); + + SPItem *copy_item = (SPItem *) _desktop->getDocument()->getObjectByRepr(copy_repr); + + Geom::Affine const *new_affine; + if (_show == SHOW_OUTLINE) { + Geom::Affine const i2d(original_item->i2dt_affine()); + Geom::Affine const i2dnew( i2d * _current_relative_affine ); + copy_item->set_i2d_affine(i2dnew); + new_affine = ©_item->transform; + } else { + new_affine = &original_item->transform; + } + + copy_item->doWriteTransform(*new_affine); + + if ( copy_item->isCenterSet() && _center ) { + copy_item->setCenter(*_center * _current_relative_affine); + } + Inkscape::GC::release(copy_repr); + SPLPEItem * lpeitem = dynamic_cast<SPLPEItem *>(copy_item); + if(lpeitem && lpeitem->hasPathEffectRecursive()) { + lpeitem->forkPathEffectsIfNecessary(1); + sp_lpe_item_update_patheffect(lpeitem, true, true); + } + } + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Stamp")); + } + + if ( fixup && !_stamp_cache.empty() ) { + // TODO - give a proper fix. Simple temporary work-around for the grab() issue + _stamp_cache.clear(); + } +} + +void Inkscape::SelTrans::_updateHandles() +{ + for (auto & knot : knots) + knot->hide(); + + if ( !_show_handles || _empty ) + return; + + if (!_center_is_set) { + _center = _desktop->selection->center(); + _center_is_set = true; + } + + if ( _state == STATE_SCALE ) { + _showHandles(HANDLE_STRETCH); + _showHandles(HANDLE_SCALE); + } else if(_state == STATE_ALIGN) { + _showHandles(HANDLE_ALIGN); + _showHandles(HANDLE_CENTER_ALIGN); + } else { + _showHandles(HANDLE_SKEW); + _showHandles(HANDLE_ROTATE); + _showHandles(HANDLE_CENTER); + } +} + +void Inkscape::SelTrans::_updateVolatileState() +{ + Inkscape::Selection *selection = _desktop->getSelection(); + _empty = selection->isEmpty(); + + if (_empty) { + return; + } + + //Update the bboxes + _bbox = selection->bounds(_snap_bbox_type); + _visual_bbox = selection->visualBounds(); + + if (!_bbox) { + _empty = true; + return; + } + + std::vector<SPItem *> vec(selection->items().begin(), selection->items().end()); + _strokewidth = stroke_average_width(vec); +} + +void Inkscape::SelTrans::_showHandles(SPSelTransType type) +{ + // shouldn't have nullary bbox, but knots + g_assert(_bbox); + + auto const y_dir = _desktop->yaxisdir(); + + for (int i = 0; i < NUMHANDS; i++) { + if (hands[i].type != type) + continue; + + // Position knots to scale the selection bbox + Geom::Point const bpos(hands[i].x, (hands[i].y - 0.5) * (-y_dir) + 0.5); + Geom::Point p(_bbox->min() + (_bbox->dimensions() * Geom::Scale(bpos))); + knots[i]->moveto(p); + knots[i]->show(); + + // This controls the center handle's position, because the default can + // be moved and needs to be remembered. + if( type == HANDLE_CENTER && _center ) + knots[i]->moveto(*_center); + } +} + +void Inkscape::SelTrans::_makeHandles() +{ + for (int i = 0; i < NUMHANDS; i++) { + SPSelTransTypeInfo info = handtypes[hands[i].type]; + knots[i] = new SPKnot(_desktop, _(info.tip)); + + knots[i]->setShape(SP_CTRL_SHAPE_BITMAP); + knots[i]->setSize(13); + knots[i]->setAnchor(hands[i].anchor); + knots[i]->setMode(SP_CTRL_MODE_XOR); + knots[i]->setFill(info.color[0], info.color[1], info.color[1], info.color[1]); + knots[i]->setStroke(info.color[2], info.color[3], info.color[3], info.color[3]); + + knots[i]->setPixbuf(handles[hands[i].control]); + knots[i]->updateCtrl(); + + knots[i]->request_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_request), &hands[i])); + knots[i]->moved_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_new_event), &hands[i])); + knots[i]->grabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_grab), &hands[i])); + knots[i]->ungrabbed_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_ungrab), &hands[i])); + knots[i]->click_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_click), &hands[i])); + knots[i]->event_signal.connect(sigc::bind(sigc::ptr_fun(sp_sel_trans_handle_event), &hands[i])); + } +} + +static void sp_sel_trans_handle_grab(SPKnot *knot, guint state, SPSelTransHandle const* data) +{ + SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleGrab( + knot, state, *(SPSelTransHandle const *) data + ); +} + +static void sp_sel_trans_handle_ungrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const* /*data*/) +{ + SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->ungrab(); +} + +static void sp_sel_trans_handle_new_event(SPKnot *knot, Geom::Point const& position, guint state, SPSelTransHandle const *data) +{ + Geom::Point pos = position; + + SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleNewEvent( + knot, &pos, state, *(SPSelTransHandle const *) data + ); +} + +static gboolean sp_sel_trans_handle_request(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const *data) +{ + return SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleRequest( + knot, position, state, *(SPSelTransHandle const *) data + ); +} + +static void sp_sel_trans_handle_click(SPKnot *knot, guint state, SPSelTransHandle const* data) +{ + SP_SELECT_CONTEXT(knot->desktop->event_context)->_seltrans->handleClick( + knot, state, *(SPSelTransHandle const *) data + ); +} + +void Inkscape::SelTrans::handleClick(SPKnot */*knot*/, guint state, SPSelTransHandle const &handle) +{ + switch (handle.type) { + case HANDLE_CENTER: + if (state & GDK_SHIFT_MASK) { + // Unset the center position for all selected items + auto items = _desktop->selection->items(); + for (auto iter=items.begin();iter!=items.end(); ++iter) { + SPItem *it = *iter; + it->unsetCenter(); + it->updateRepr(); + _center_is_set = false; // center has changed + _updateHandles(); + } + DocumentUndo::done(_desktop->getDocument(), SP_VERB_CONTEXT_SELECT, + _("Reset center")); + } + break; + case HANDLE_ALIGN: + case HANDLE_CENTER_ALIGN: + align(state, handle); + default: + break; + } +} + +void Inkscape::SelTrans::handleGrab(SPKnot *knot, guint /*state*/, SPSelTransHandle const &handle) +{ + grab(knot->position(), handle.x, handle.y, FALSE, FALSE); + + // Forcing handles visibility must be done after grab() to be effective + switch (handle.type) { + case HANDLE_CENTER: + g_object_set(G_OBJECT(_grip), + "shape", SP_CTRL_SHAPE_BITMAP, + "size", 13, + NULL); + sp_canvas_item_hide(_norm); + sp_canvas_item_show(_grip); + break; + default: + g_object_set(G_OBJECT(_grip), + "shape", SP_CTRL_SHAPE_CROSS, + "size", 7, + NULL); + sp_canvas_item_show(_norm); + sp_canvas_item_show(_grip); + break; + } +} + + +void Inkscape::SelTrans::handleNewEvent(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle) +{ + if (!SP_KNOT_IS_GRABBED(knot)) { + return; + } + + // in case items have been unhooked from the document, don't + // try to continue processing events for them. + for (auto & _item : _items) { + if ( !_item->document ) { + return; + } + } + switch (handle.type) { + case HANDLE_SCALE: + scale(*position, state); + break; + case HANDLE_STRETCH: + stretch(handle, *position, state); + break; + case HANDLE_SKEW: + skew(handle, *position, state); + break; + case HANDLE_ROTATE: + rotate(*position, state); + break; + case HANDLE_CENTER: + setCenter(*position); + break; + case HANDLE_ALIGN: + case HANDLE_CENTER_ALIGN: + break; + } +} + + +gboolean Inkscape::SelTrans::handleRequest(SPKnot *knot, Geom::Point *position, guint state, SPSelTransHandle const &handle) +{ + if (!SP_KNOT_IS_GRABBED(knot)) + return TRUE; + + // When holding shift while rotating or skewing, the transformation will be + // relative to the point opposite of the handle; otherwise it will be relative + // to the center as set for the selection + if ((!(state & GDK_SHIFT_MASK) == !(_state == STATE_ROTATE)) && (handle.type != HANDLE_CENTER)) { + _origin = _opposite; + _origin_for_bboxpoints = _opposite_for_bboxpoints; + _origin_for_specpoints = _opposite_for_specpoints; + } else if (_center) { + _origin = *_center; + _origin_for_bboxpoints = *_center; + _origin_for_specpoints = *_center; + } else { + // FIXME + return TRUE; + } + if (request(handle, *position, state)) { + knot->setPosition(*position, state); + SP_CTRL(_grip)->moveto(*position); + if (handle.type == HANDLE_CENTER) { + SP_CTRL(_norm)->moveto(*position); + } else { + SP_CTRL(_norm)->moveto(_origin); + } + } + + return TRUE; +} + + +void Inkscape::SelTrans::_selChanged(Inkscape::Selection */*selection*/) +{ + if (!_grabbed) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + // reread in case it changed on the fly: + int prefs_bbox = prefs->getBool("/tools/bounding_box"); + _snap_bbox_type = !prefs_bbox ? + SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; + + _updateVolatileState(); + _current_relative_affine.setIdentity(); + _center_is_set = false; // center(s) may have changed + _updateHandles(); + } +} + +void Inkscape::SelTrans::_selModified(Inkscape::Selection */*selection*/, guint /*flags*/) +{ + if (!_grabbed) { + _updateVolatileState(); + _current_relative_affine.setIdentity(); + + // reset internal flag + _changed = false; + + _center_is_set = false; // center(s) may have changed + + _updateHandles(); + } +} + +void Inkscape::SelTrans::_boundingBoxPrefsChanged(int prefs_bbox) +{ + _snap_bbox_type = !prefs_bbox ? + SPItem::VISUAL_BBOX : SPItem::GEOMETRIC_BBOX; + + _updateVolatileState(); + _updateHandles(); +} + +/* + * handlers for handle move-request + */ + +/** Returns -1 or 1 according to the sign of x. Returns 1 for 0 and NaN. */ +static double sign(double const x) +{ + return ( x < 0 + ? -1 + : 1 ); +} + +gboolean Inkscape::SelTrans::scaleRequest(Geom::Point &pt, guint state) +{ + + // Calculate the scale factors, which can be either visual or geometric + // depending on which type of bbox is currently being used (see preferences -> selector tool) + Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin); + + // Find the scale factors for the geometric bbox + Geom::Point pt_geom = _getGeomHandlePos(pt); + Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints); + + _absolute_affine = Geom::identity(); //Initialize the scaler + + if (state & GDK_MOD1_MASK) { // scale by an integer multiplier/divider + // We're scaling either the visual or the geometric bbox here (see the comment above) + for ( unsigned int i = 0 ; i < 2 ; i++ ) { + if (fabs(default_scale[i]) > 1) { + default_scale[i] = round(default_scale[i]); + } else if (default_scale[i] != 0) { + default_scale[i] = 1/round(1/(MIN(default_scale[i], 10))); + } + } + // Update the knot position + pt = _calcAbsAffineDefault(default_scale); + // When scaling by an integer, snapping is not needed + } else { + // In all other cases we should try to snap now + Inkscape::PureScale *bb, *sn; + + if ((state & GDK_CONTROL_MASK) || _desktop->isToolboxButtonActive ("lock")) { + // Scale is locked to a 1:1 aspect ratio, so that s[X] must be made to equal s[Y]. + // + // The aspect-ratio must be locked before snapping + if (fabs(default_scale[Geom::X]) > fabs(default_scale[Geom::Y])) { + default_scale[Geom::X] = fabs(default_scale[Geom::Y]) * sign(default_scale[Geom::X]); + geom_scale[Geom::X] = fabs(geom_scale[Geom::Y]) * sign(geom_scale[Geom::X]); + } else { + default_scale[Geom::Y] = fabs(default_scale[Geom::X]) * sign(default_scale[Geom::Y]); + geom_scale[Geom::Y] = fabs(geom_scale[Geom::X]) * sign(geom_scale[Geom::Y]); + } + + // Snap along a suitable constraint vector from the origin. + + bb = new Inkscape::PureScaleConstrained(default_scale, _origin_for_bboxpoints); + sn = new Inkscape::PureScaleConstrained(geom_scale, _origin_for_specpoints); + } else { + /* Scale aspect ratio is unlocked */ + bb = new Inkscape::PureScale(default_scale, _origin_for_bboxpoints, false); + sn = new Inkscape::PureScale(geom_scale, _origin_for_specpoints, false); + } + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop, false, _items_const); + m.snapTransformed(_bbox_points, _point, (*bb)); + m.snapTransformed(_snap_points, _point, (*sn)); + m.unSetup(); + + // These lines below are duplicated in stretchRequest + //TODO: Eliminate this code duplication + if (bb->best_snapped_point.getSnapped() || sn->best_snapped_point.getSnapped()) { + if (bb->best_snapped_point.getSnapped()) { + if (!bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, false)) { + // We snapped the bbox (which is either visual or geometric) + _desktop->snapindicator->set_new_snaptarget(bb->best_snapped_point); + default_scale = bb->getScaleSnapped(); + // Calculate the new transformation and update the handle position + pt = _calcAbsAffineDefault(default_scale); + } + } else if (sn->best_snapped_point.getSnapped()) { + _desktop->snapindicator->set_new_snaptarget(sn->best_snapped_point); + // We snapped the special points (e.g. nodes), which are not at the visual bbox + // The handle location however (pt) might however be at the visual bbox, so we + // will have to calculate pt taking the stroke width into account + geom_scale = sn->getScaleSnapped(); + pt = _calcAbsAffineGeom(geom_scale); + } + } else { + // We didn't snap at all! Don't update the handle position, just calculate the new transformation + _calcAbsAffineDefault(default_scale); + _desktop->snapindicator->remove_snaptarget(); + } + + delete bb; + delete sn; + } + + /* Status text */ + _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, + _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"), + 100 * _absolute_affine[0], 100 * _absolute_affine[3]); + + return TRUE; +} + +gboolean Inkscape::SelTrans::stretchRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state) +{ + Geom::Dim2 axis, perp; + switch (handle.cursor) { + case GDK_TOP_SIDE: + case GDK_BOTTOM_SIDE: + axis = Geom::Y; + perp = Geom::X; + break; + case GDK_LEFT_SIDE: + case GDK_RIGHT_SIDE: + axis = Geom::X; + perp = Geom::Y; + break; + default: + g_assert_not_reached(); + return TRUE; + }; + + // Calculate the scale factors, which can be either visual or geometric + // depending on which type of bbox is currently being used (see preferences -> selector tool) + Geom::Scale default_scale = calcScaleFactors(_point, pt, _origin); + default_scale[perp] = 1; + + // Find the scale factors for the geometric bbox + Geom::Point pt_geom = _getGeomHandlePos(pt); + Geom::Scale geom_scale = calcScaleFactors(_point_geom, pt_geom, _origin_for_specpoints); + geom_scale[perp] = 1; + + _absolute_affine = Geom::identity(); //Initialize the scaler + + if (state & GDK_MOD1_MASK) { // stretch by an integer multiplier/divider + if (fabs(default_scale[axis]) > 1) { + default_scale[axis] = round(default_scale[axis]); + } else if (default_scale[axis] != 0) { + default_scale[axis] = 1/round(1/(MIN(default_scale[axis], 10))); + } + // Calculate the new transformation and update the handle position + pt = _calcAbsAffineDefault(default_scale); + // When stretching by an integer, snapping is not needed + } else { + // In all other cases we should try to snap now + + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop, false, _items_const); + + bool symmetrical = state & GDK_CONTROL_MASK; + + Inkscape::PureStretchConstrained bb = Inkscape::PureStretchConstrained(Geom::Coord(default_scale[axis]), _origin_for_bboxpoints, Geom::Dim2(axis), symmetrical); + Inkscape::PureStretchConstrained sn = Inkscape::PureStretchConstrained(Geom::Coord(geom_scale[axis]), _origin_for_specpoints, Geom::Dim2(axis), symmetrical); + + m.snapTransformed(_bbox_points, _point, bb); + m.snapTransformed(_snap_points, _point, sn); + m.unSetup(); + + if (bb.best_snapped_point.getSnapped()) { + // We snapped the bbox (which is either visual or geometric) + default_scale[axis] = bb.getMagnitude(); + } + + if (sn.best_snapped_point.getSnapped()) { + geom_scale[axis] = sn.getMagnitude(); + } + + if (symmetrical) { + // on ctrl, apply symmetrical scaling instead of stretching + // Preserve aspect ratio, but never flip in the dimension not being edited (by using fabs()) + default_scale[perp] = fabs(default_scale[axis]); + geom_scale[perp] = fabs(geom_scale[axis]); + } + + // These lines below are duplicated in scaleRequest + if (bb.best_snapped_point.getSnapped() || sn.best_snapped_point.getSnapped()) { + if (bb.best_snapped_point.getSnapped()) { + if (!bb.best_snapped_point.isOtherSnapBetter(sn.best_snapped_point, false)) { + // We snapped the bbox (which is either visual or geometric) + _desktop->snapindicator->set_new_snaptarget(bb.best_snapped_point); + default_scale = bb.getStretchSnapped(); + // Calculate the new transformation and update the handle position + pt = _calcAbsAffineDefault(default_scale); + } + } else if (sn.best_snapped_point.getSnapped()) { + _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); + // We snapped the special points (e.g. nodes), which are not at the visual bbox + // The handle location however (pt) might however be at the visual bbox, so we + // will have to calculate pt taking the stroke width into account + geom_scale = sn.getStretchSnapped(); + pt = _calcAbsAffineGeom(geom_scale); + } + } else { + // We didn't snap at all! Don't update the handle position, just calculate the new transformation + _calcAbsAffineDefault(default_scale); + _desktop->snapindicator->remove_snaptarget(); + } + } + + // status text + _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, + _("<b>Scale</b>: %0.2f%% x %0.2f%%; with <b>Ctrl</b> to lock ratio"), + 100 * _absolute_affine[0], 100 * _absolute_affine[3]); + + return TRUE; +} + +gboolean Inkscape::SelTrans::request(SPSelTransHandle const &handle, Geom::Point &pt, guint state) +{ + // These _should_ be in the handstype somewhere instead + switch (handle.type) { + case HANDLE_SCALE: + return scaleRequest(pt, state); + case HANDLE_STRETCH: + return stretchRequest(handle, pt, state); + case HANDLE_SKEW: + return skewRequest(handle, pt, state); + case HANDLE_ROTATE: + return rotateRequest(pt, state); + case HANDLE_CENTER: + return centerRequest(pt, state); + case HANDLE_ALIGN: + case HANDLE_CENTER_ALIGN: + break; // Do nothing, no dragging + } + return FALSE; +} + +gboolean Inkscape::SelTrans::skewRequest(SPSelTransHandle const &handle, Geom::Point &pt, guint state) +{ + /* When skewing (or rotating): + * 1) the stroke width will not change. This makes life much easier because we don't have to + * account for that (like for scaling or stretching). As a consequence, all points will + * have the same origin for the transformation and for the snapping. + * 2) When holding shift, the transformation will be relative to the point opposite of + * the handle; otherwise it will be relative to the center as set for the selection + */ + + Geom::Dim2 dim_a; + Geom::Dim2 dim_b; + + switch (handle.cursor) { + case GDK_SB_H_DOUBLE_ARROW: + dim_a = Geom::Y; + dim_b = Geom::X; + break; + case GDK_SB_V_DOUBLE_ARROW: + dim_a = Geom::X; + dim_b = Geom::Y; + break; + default: + g_assert_not_reached(); + abort(); + break; + } + + // _point and _origin are noisy, ranging from 1 to 1e-9 or even smaller; this is due to the + // limited SVG output precision, which can be arbitrarily set in the preferences + Geom::Point const initial_delta = _point - _origin; + + // The handle and the origin shouldn't be too close to each other; let's check for that! + // Due to the limited resolution though (see above), we'd better use a relative error here + if (_bbox) { + Geom::Coord d = (*_bbox).dimensions()[dim_a]; + if (fabs(initial_delta[dim_a]/d) < 1e-4) { + return false; + } + } + + // Calculate the scale factors, which can be either visual or geometric + // depending on which type of bbox is currently being used (see preferences -> selector tool) + Geom::Scale scale = calcScaleFactors(_point, pt, _origin, false); + Geom::Scale skew = calcScaleFactors(_point, pt, _origin, true); + scale[dim_b] = 1; + skew[dim_b] = 1; + + if (fabs(scale[dim_a]) < 1) { + // Prevent shrinking of the selected object, while allowing mirroring + scale[dim_a] = sign(scale[dim_a]); + } else { + // Allow expanding of the selected object by integer multiples + scale[dim_a] = floor(scale[dim_a] + 0.5); + } + + double radians = atan(skew[dim_a] / scale[dim_a]); + + if (state & GDK_CONTROL_MASK) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + // Snap to defined angle increments + int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12); + if (snaps) { + double sections = floor(radians * snaps / M_PI + .5); + if (fabs(sections) >= snaps / 2) { + sections = sign(sections) * (snaps / 2 - 1); + } + radians = (M_PI / snaps) * sections; + } + skew[dim_a] = tan(radians) * scale[dim_a]; + } else { + // Snap to objects, grids, guides + + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop, false, _items_const); + + // When skewing, we cannot snap the corners of the bounding box, see the comment in PureSkewConstrained for details + Inkscape::PureSkewConstrained sn = Inkscape::PureSkewConstrained(skew[dim_a], scale[dim_a], _origin, Geom::Dim2(dim_b)); + m.snapTransformed(_snap_points, _point, sn); + + if (sn.best_snapped_point.getSnapped()) { + // We snapped something, so change the skew to reflect it + skew[dim_a] = sn.getSkewSnapped(); + _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); + } else { + _desktop->snapindicator->remove_snaptarget(); + } + + m.unSetup(); + } + + // Update the handle position + pt[dim_b] = initial_delta[dim_a] * skew[dim_a] + _point[dim_b]; + pt[dim_a] = initial_delta[dim_a] * scale[dim_a] + _origin[dim_a]; + + // Calculate the relative affine + _relative_affine = Geom::identity(); + _relative_affine[2*dim_a + dim_a] = (pt[dim_a] - _origin[dim_a]) / initial_delta[dim_a]; + _relative_affine[2*dim_a + (dim_b)] = (pt[dim_b] - _point[dim_b]) / initial_delta[dim_a]; + _relative_affine[2*(dim_b) + (dim_a)] = 0; + _relative_affine[2*(dim_b) + (dim_b)] = 1; + + for (int i = 0; i < 2; i++) { + if (fabs(_relative_affine[3*i]) < 1e-15) { + _relative_affine[3*i] = 1e-15; + } + } + + // Update the status text + double degrees = mod360symm(Geom::deg_from_rad(radians)); + _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, + // TRANSLATORS: don't modify the first ";" + // (it will NOT be displayed as ";" - only the second one will be) + _("<b>Skew</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), + degrees); + + return TRUE; +} + +gboolean Inkscape::SelTrans::rotateRequest(Geom::Point &pt, guint state) +{ + /* When rotating (or skewing): + * 1) the stroke width will not change. This makes life much easier because we don't have to + * account for that (like for scaling or stretching). As a consequence, all points will + * have the same origin for the transformation and for the snapping. + * 2) When holding shift, the transformation will be relative to the point opposite of + * the handle; otherwise it will be relative to the center as set for the selection + */ + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + int snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12); + + // rotate affine in rotate + Geom::Point const d1 = _point - _origin; + Geom::Point const d2 = pt - _origin; + + Geom::Coord const h1 = Geom::L2(d1); // initial radius + if (h1 < 1e-15) return FALSE; + Geom::Point q1 = d1 / h1; // normalized initial vector to handle + Geom::Coord const h2 = Geom::L2(d2); // new radius + if (fabs(h2) < 1e-15) return FALSE; + Geom::Point q2 = d2 / h2; // normalized new vector to handle + + Geom::Rotate r1(q1); + Geom::Rotate r2(q2); + + double radians = atan2(Geom::dot(Geom::rot90(d1), d2), Geom::dot(d1, d2));; + if (state & GDK_CONTROL_MASK) { + // Snap to defined angle increments + double cos_t = Geom::dot(q1, q2); + double sin_t = Geom::dot(Geom::rot90(q1), q2); + radians = atan2(sin_t, cos_t); + if (snaps) { + radians = ( M_PI / snaps ) * floor( radians * snaps / M_PI + .5 ); + } + r1 = Geom::Rotate(0); //q1 = Geom::Point(1, 0); + r2 = Geom::Rotate(radians); //q2 = Geom::Point(cos(radians), sin(radians)); + } else { + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop, false, _items_const); + // When rotating, we cannot snap the corners of the bounding box, see the comment in "constrainedSnapRotate" for details + Inkscape::PureRotateConstrained sn = Inkscape::PureRotateConstrained(radians, _origin); + m.snapTransformed(_snap_points, _point, sn); + m.unSetup(); + + if (sn.best_snapped_point.getSnapped()) { + _desktop->snapindicator->set_new_snaptarget(sn.best_snapped_point); + // We snapped something, so change the rotation to reflect it + radians = sn.getAngleSnapped(); + r1 = Geom::Rotate(0); + r2 = Geom::Rotate(radians); + } else { + _desktop->snapindicator->remove_snaptarget(); + } + + } + + + // Calculate the relative affine + _relative_affine = r2 * r1.inverse(); + + // Update the handle position + pt = _point * Geom::Translate(-_origin) * _relative_affine * Geom::Translate(_origin); + + // Update the status text + double degrees = mod360symm(Geom::deg_from_rad(radians)); + _message_context.setF(Inkscape::IMMEDIATE_MESSAGE, + // TRANSLATORS: don't modify the first ";" + // (it will NOT be displayed as ";" - only the second one will be) + _("<b>Rotate</b>: %0.2f°; with <b>Ctrl</b> to snap angle"), degrees); + + return TRUE; +} + +// Move the item's transformation center +gboolean Inkscape::SelTrans::centerRequest(Geom::Point &pt, guint state) +{ + // When dragging the transformation center while multiple items have been selected, then those + // items will share a single center. While dragging that single center, it should never snap to the + // centers of any of the selected objects. Therefore we will have to pass the list of selected items + // to the snapper, to avoid self-snapping of the rotation center + std::vector<SPItem *> items(_selection->items().begin(), _selection->items().end()); + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.setRotationCenterSource(items); + + if (state & GDK_CONTROL_MASK) { // with Ctrl, constrain to axes + std::vector<Inkscape::Snapper::SnapConstraint> constraints; + constraints.emplace_back(_point, Geom::Point(1, 0)); + constraints.emplace_back(_point, Geom::Point(0, 1)); + Inkscape::SnappedPoint sp = m.multipleConstrainedSnaps(Inkscape::SnapCandidatePoint(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER), constraints, state & GDK_SHIFT_MASK); + pt = sp.getPoint(); + } + else { + if (!(state & GDK_SHIFT_MASK)) { // Shift disables snapping + m.freeSnapReturnByRef(pt, Inkscape::SNAPSOURCE_ROTATION_CENTER); + } + } + + m.unSetup(); + + // status text + Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(pt[Geom::X], "px"); + Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(pt[Geom::Y], "px"); + Glib::ustring xs(x_q.string(_desktop->namedview->display_units)); + Glib::ustring ys(y_q.string(_desktop->namedview->display_units)); + _message_context.setF(Inkscape::NORMAL_MESSAGE, _("Move <b>center</b> to %s, %s"), + xs.c_str(), ys.c_str()); + return TRUE; +} + +void Inkscape::SelTrans::align(guint state, SPSelTransHandle const &handle) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool sel_as_group = prefs->getBool("/dialogs/align/sel-as-groups"); + int align_to = prefs->getInt("/dialogs/align/align-to", 6); + + int verb_id = -1; + if (state & GDK_SHIFT_MASK) { + verb_id = AlignVerb[handle.control + AlignHandleToVerb + AlignShiftVerb]; + } else { + verb_id = AlignVerb[handle.control + AlignHandleToVerb]; + } + if(verb_id >= 0) { + prefs->setBool("/dialogs/align/sel-as-groups", (state & GDK_CONTROL_MASK) != 0); + prefs->setInt("/dialogs/align/align-to", 6); + Inkscape::Verb *verb = Inkscape::Verb::get( verb_id ); + g_assert( verb != NULL ); + SPAction *action = verb->get_action((Inkscape::UI::View::View *) this->_desktop); + sp_action_perform (action, NULL); + } + + // Set the special align point and settings back to nothing so we don't interfere + prefs->setBool("/dialogs/align/sel-as-groups", sel_as_group); + prefs->setInt("/dialogs/align/align-to", align_to); +} + +/* + * handlers for handle movement + * + */ + + + +void Inkscape::SelTrans::stretch(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/) +{ + transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0 +} + +void Inkscape::SelTrans::scale(Geom::Point &/*pt*/, guint /*state*/) +{ + transform(_absolute_affine, Geom::Point(0, 0)); // we have already accounted for origin, so pass 0,0 +} + +void Inkscape::SelTrans::skew(SPSelTransHandle const &/*handle*/, Geom::Point &/*pt*/, guint /*state*/) +{ + transform(_relative_affine, _origin); +} + +void Inkscape::SelTrans::rotate(Geom::Point &/*pt*/, guint /*state*/) +{ + transform(_relative_affine, _origin); +} + +void Inkscape::SelTrans::moveTo(Geom::Point const &xy, guint state) +{ + SnapManager &m = _desktop->namedview->snap_manager; + + /* The amount that we've moved by during this drag */ + Geom::Point dxy = xy - _point; + + bool const alt = (state & GDK_MOD1_MASK); + bool const control = (state & GDK_CONTROL_MASK); + bool const shift = (state & GDK_SHIFT_MASK); + + if (control) { // constrained to the orthogonal axes + if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) { + dxy[Geom::Y] = 0; + } else { + dxy[Geom::X] = 0; + } + } + + if (alt) {// Alt pressed means: move only by integer multiples of the grid spacing + m.setup(_desktop, true, _items_const); + dxy = m.multipleOfGridPitch(dxy, _point); + m.unSetup(); + } else if (!shift) { //!shift: with snapping + /* We're snapping to things, possibly with a constraint to horizontal or + ** vertical movement. Obtain a list of possible translations and then + ** pick the smallest. + */ + + m.setup(_desktop, false, _items_const); + + /* This will be our list of possible translations */ + std::list<Inkscape::SnappedPoint> s; + + Inkscape::PureTranslate *bb, *sn; + + if (control) { // constrained movement with snapping + + /* Snap to things, and also constrain to horizontal or vertical movement */ + + Geom::Dim2 dim = fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y]) ? Geom::X : Geom::Y; + // When doing a constrained translation, all points will move in the same direction, i.e. + // either horizontally or vertically. Therefore we only have to specify the direction of + // the constraint-line once. The constraint lines are parallel, but might not be colinear. + // Therefore we will have to set the point through which the constraint-line runs + // individually for each point to be snapped; this will be handled however by snapTransformed() + bb = new Inkscape::PureTranslateConstrained(dxy[dim], dim); + sn = new Inkscape::PureTranslateConstrained(dxy[dim], dim); + } else { // !control + /* Snap to things with no constraint */ + bb = new Inkscape::PureTranslate(dxy); + sn = new Inkscape::PureTranslate(dxy); + } + // Let's leave this timer code here for a while. I'll probably need it in the near future (Diederik van Lierop) + /* GTimeVal starttime; + GTimeVal endtime; + g_get_current_time(&starttime); */ + + m.snapTransformed(_bbox_points, _point, (*bb)); + m.snapTransformed(_snap_points, _point, (*sn)); + m.unSetup(); + + /*g_get_current_time(&endtime); + double elapsed = ((((double)endtime.tv_sec - starttime.tv_sec) * G_USEC_PER_SEC + (endtime.tv_usec - starttime.tv_usec))) / 1000.0; + std::cout << "Time spent snapping: " << elapsed << std::endl; */ + + /* Pick one */ + Inkscape::SnappedPoint best_snapped_point; + + bool sn_is_best = sn->best_snapped_point.getSnapped(); + bool bb_is_best = bb->best_snapped_point.getSnapped(); + + if (bb_is_best && sn_is_best) { + sn_is_best = bb->best_snapped_point.isOtherSnapBetter(sn->best_snapped_point, true); + bb_is_best = !sn_is_best; + } + + if (sn_is_best) { + best_snapped_point = sn->best_snapped_point; + dxy = sn->getTranslationSnapped(); + } else if (bb_is_best) { + best_snapped_point = bb->best_snapped_point; + dxy = bb->getTranslationSnapped(); + } + + if (best_snapped_point.getSnapped()) { + _desktop->snapindicator->set_new_snaptarget(best_snapped_point); + } else { + // We didn't snap, so remove any previous snap indicator + _desktop->snapindicator->remove_snaptarget(); + if (control) { + // If we didn't snap, then we should still constrain horizontally or vertically + // (When we did snap, then this constraint has already been enforced by + // calling constrainedSnapTranslate() above) + if (fabs(dxy[Geom::X]) > fabs(dxy[Geom::Y])) { + dxy[Geom::Y] = 0; + } else { + dxy[Geom::X] = 0; + } + } + } + delete bb; + delete sn; + } + + Geom::Affine const move((Geom::Translate(dxy))); + Geom::Point const norm(0, 0); + transform(move, norm); + + // status text + Inkscape::Util::Quantity x_q = Inkscape::Util::Quantity(dxy[Geom::X], "px"); + Inkscape::Util::Quantity y_q = Inkscape::Util::Quantity(dxy[Geom::Y], "px"); + Glib::ustring xs(x_q.string(_desktop->namedview->display_units)); + Glib::ustring ys(y_q.string(_desktop->namedview->display_units)); + _message_context.setF(Inkscape::NORMAL_MESSAGE, + _("<b>Move</b> by %s, %s; with <b>Ctrl</b> to restrict to horizontal/vertical; with <b>Shift</b> to disable snapping"), + xs.c_str(), ys.c_str()); +} + +// Given a location of a handle at the visual bounding box, find the corresponding location at the +// geometrical bounding box +Geom::Point Inkscape::SelTrans::_getGeomHandlePos(Geom::Point const &visual_handle_pos) +{ + if ( _snap_bbox_type == SPItem::GEOMETRIC_BBOX) { + // When the selector tool is using geometric bboxes, then the handle is already + // located at one of the geometric bbox corners + return visual_handle_pos; + } + + if (!_geometric_bbox) { + //_getGeomHandlePos() can only be used after _geometric_bbox has been defined! + return visual_handle_pos; + } + + // Using the Geom::Rect constructor below ensures that "min() < max()", which is important + // because this will also hold for _bbox, and which is required for get_scale_transform_for_stroke() + Geom::Rect new_bbox = Geom::Rect(_origin_for_bboxpoints, visual_handle_pos); // new visual bounding box + // Please note that the new_bbox might in fact be just a single line, for example when stretching (in + // which case the handle and origin will be aligned vertically or horizontally) + Geom::Point normalized_handle_pos = (visual_handle_pos - new_bbox.min()) * Geom::Scale(new_bbox.dimensions()).inverse(); + + // Calculate the absolute affine while taking into account the scaling of the stroke width + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool transform_stroke = prefs->getBool("/options/transform/stroke", true); + bool preserve = prefs->getBool("/options/preservetransform/value", false); + Geom::Affine abs_affine = get_scale_transform_for_uniform_stroke (*_bbox, _strokewidth, _strokewidth, transform_stroke, preserve, + new_bbox.min()[Geom::X], new_bbox.min()[Geom::Y], new_bbox.max()[Geom::X], new_bbox.max()[Geom::Y]); + + // Calculate the scaled geometrical bbox + Geom::Rect new_geom_bbox = Geom::Rect(_geometric_bbox->min() * abs_affine, _geometric_bbox->max() * abs_affine); + // Find the location of the handle on this new geometrical bbox + return normalized_handle_pos * Geom::Scale(new_geom_bbox.dimensions()) + new_geom_bbox.min(); //new position of the geometric handle +} + +Geom::Scale Inkscape::calcScaleFactors(Geom::Point const &initial_point, Geom::Point const &new_point, Geom::Point const &origin, bool const skew) +{ + // Work out the new scale factors for the bbox + + Geom::Point const initial_delta = initial_point - origin; + Geom::Point const new_delta = new_point - origin; + Geom::Point const offset = new_point - initial_point; + Geom::Scale scale(1, 1); + + for ( unsigned int i = 0 ; i < 2 ; i++ ) { + if ( fabs(initial_delta[i]) > 1e-6 ) { + if (skew) { + scale[i] = offset[1-i] / initial_delta[i]; + } else { + scale[i] = new_delta[i] / initial_delta[i]; + } + } + } + + return scale; +} + +// Only for scaling/stretching +Geom::Point Inkscape::SelTrans::_calcAbsAffineDefault(Geom::Scale const default_scale) +{ + Geom::Affine abs_affine = Geom::Translate(-_origin) * Geom::Affine(default_scale) * Geom::Translate(_origin); + Geom::Point new_bbox_min = _visual_bbox->min() * abs_affine; + Geom::Point new_bbox_max = _visual_bbox->max() * abs_affine; + + bool transform_stroke = false; + bool preserve = false; + gdouble stroke_x = 0; + gdouble stroke_y = 0; + + if ( _snap_bbox_type != SPItem::GEOMETRIC_BBOX) { + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + transform_stroke = prefs->getBool("/options/transform/stroke", true); + preserve = prefs->getBool("/options/preservetransform/value", false); + stroke_x = _visual_bbox->width() - _geometric_bbox->width(); + stroke_y = _visual_bbox->height() - _geometric_bbox->height(); + } + + _absolute_affine = get_scale_transform_for_uniform_stroke (*_visual_bbox, stroke_x, stroke_y, transform_stroke, preserve, + new_bbox_min[Geom::X], new_bbox_min[Geom::Y], new_bbox_max[Geom::X], new_bbox_max[Geom::Y]); + + // return the new handle position + return ( _point - _origin ) * default_scale + _origin; +} + +// Only for scaling/stretching +Geom::Point Inkscape::SelTrans::_calcAbsAffineGeom(Geom::Scale const geom_scale) +{ + _relative_affine = Geom::Affine(geom_scale); + _absolute_affine = Geom::Translate(-_origin_for_specpoints) * _relative_affine * Geom::Translate(_origin_for_specpoints); + + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + bool const transform_stroke = prefs->getBool("/options/transform/stroke", true); + if (_geometric_bbox) { + Geom::Rect visual_bbox = get_visual_bbox(_geometric_bbox, _absolute_affine, _strokewidth, transform_stroke); + // return the new handle position + return visual_bbox.min() + visual_bbox.dimensions() * Geom::Scale(_handle_x, _handle_y); + } + + // Fall back scenario, in case we don't have a geometric bounding box at hand; + // (Due to some bugs related to bounding boxes having at least one zero dimension; For more details + // see https://bugs.launchpad.net/inkscape/+bug/318726) + g_warning("No geometric bounding box has been calculated; this is a bug that needs fixing!"); + return _calcAbsAffineDefault(geom_scale); // this is bogus, but we must return _something_ +} + +void Inkscape::SelTrans::_keepClosestPointOnly(Geom::Point const &p) +{ + SnapManager const &m = _desktop->namedview->snap_manager; + + // If we're not going to snap nodes, then we might just as well get rid of their snappoints right away + if (!(m.snapprefs.isTargetSnappable(SNAPTARGET_NODE_CATEGORY, SNAPTARGET_OTHERS_CATEGORY) || m.snapprefs.isAnyDatumSnappable())) { + _snap_points.clear(); + } + + // If we're not going to snap bounding boxes, then we might just as well get rid of their snappoints right away + if (!m.snapprefs.isTargetSnappable(SNAPTARGET_BBOX_CATEGORY)) { + _bbox_points.clear(); + } + + _all_snap_sources_sorted = _snap_points; + _all_snap_sources_sorted.insert(_all_snap_sources_sorted.end(), _bbox_points.begin(), _bbox_points.end()); + + // Calculate and store the distance to the reference point for each snap candidate point + for(auto & i : _all_snap_sources_sorted) { + i.setDistance(Geom::L2(i.getPoint() - p)); + } + + // Sort them ascending, using the distance calculated above as the single criteria + std::sort(_all_snap_sources_sorted.begin(), _all_snap_sources_sorted.end()); + + // Now get the closest snap source + _snap_points.clear(); + _bbox_points.clear(); + if (!_all_snap_sources_sorted.empty()) { + _all_snap_sources_iter = _all_snap_sources_sorted.begin(); + if (_all_snap_sources_sorted.front().getSourceType() & SNAPSOURCE_BBOX_CATEGORY) { + _bbox_points.push_back(_all_snap_sources_sorted.front()); + } else { + _snap_points.push_back(_all_snap_sources_sorted.front()); + } + } + +} +// TODO: This code is duplicated in transform-handle-set.cpp; fix this! +void Inkscape::SelTrans::getNextClosestPoint(bool reverse) +{ + Inkscape::Preferences *prefs = Inkscape::Preferences::get(); + if (prefs->getBool("/options/snapclosestonly/value", false)) { + if (!_all_snap_sources_sorted.empty()) { + if (reverse) { // Shift-tab will find a closer point + if (_all_snap_sources_iter == _all_snap_sources_sorted.begin()) { + _all_snap_sources_iter = _all_snap_sources_sorted.end(); + } + --_all_snap_sources_iter; + } else { // Tab will find a point further away + ++_all_snap_sources_iter; + if (_all_snap_sources_iter == _all_snap_sources_sorted.end()) { + _all_snap_sources_iter = _all_snap_sources_sorted.begin(); + } + } + + _snap_points.clear(); + _bbox_points.clear(); + + if ((*_all_snap_sources_iter).getSourceType() & SNAPSOURCE_BBOX_CATEGORY) { + _bbox_points.push_back(*_all_snap_sources_iter); + } else { + _snap_points.push_back(*_all_snap_sources_iter); + } + + // Show the updated snap source now; otherwise it won't be shown until the selection is being moved again + SnapManager &m = _desktop->namedview->snap_manager; + m.setup(_desktop); + m.displaySnapsource(*_all_snap_sources_iter); + m.unSetup(); + } + } +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |